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AISI 431 Stainless Steel vs. ACI-ASTM CD3MCuN Steel

Both AISI 431 stainless steel and ACI-ASTM CD3MCuN steel are iron alloys. They have 81% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is ACI-ASTM CD3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 15 to 17
29
Fatigue Strength, MPa 430 to 610
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
790
Tensile Strength: Yield (Proof), MPa 710 to 1040
500

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 400
450
Maximum Temperature: Mechanical, °C 850
1100
Melting Completion (Liquidus), °C 1510
1440
Melting Onset (Solidus), °C 1450
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 26
15
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
3.9
Embodied Energy, MJ/kg 31
54
Embodied Water, L/kg 120
180

Common Calculations

PREN (Pitting Resistance) 16
41
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
200
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
620
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 50
28
Strength to Weight: Bending, points 27 to 36
24
Thermal Diffusivity, mm2/s 7.0
4.1
Thermal Shock Resistance, points 28 to 43
22

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 15 to 17
24 to 26.7
Copper (Cu), % 0
1.4 to 1.9
Iron (Fe), % 78.2 to 83.8
58.2 to 65.9
Manganese (Mn), % 0 to 1.0
0 to 1.2
Molybdenum (Mo), % 0
2.9 to 3.8
Nickel (Ni), % 1.3 to 2.5
5.6 to 6.7
Nitrogen (N), % 0
0.22 to 0.33
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.1
Sulfur (S), % 0 to 0.030
0 to 0.030